That is literally the hardest boss fight in Breath of the Wild, including the end boss. It took me weeks to get ready for the fight, while the final boss I beat on the first try πππ
Well... I beat the WaterBlight Ganon, but at this time, I didn't like to explore because of Guardians, so I just got armor and hearty food and weapons. I pretty much stalled for bouta yearπ€·